TNF and colorectal cancer: These results are in accordance with many several previous meta-analyses and other studies that reported no association between the TNF-α-308G/A SNP and colorectal cancer susceptibility (Chen et al., 2013, Landi et al., 2003, Ohtani et al., 2009, Park et al., 1998, Stanilov et al., 2014, Theodoratou et al., 2012, Theodoropoulos et al., 2006, Wang et al., 2011).